Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and the fourth letter-cluster is related to the third letter-cluster.

CIVILIAN : AGREFCSF :: DOCTRINE : BMYPLCFW :: EQUATION : ?

A

NUGFSDA

B

BURDSTER

C

VUGHLOPA

D

COQWNCGF